"Please come back for a complementary “Buka Puasa” dinner at Raj's Banana Leaf BANGSAR outlet only from 7.30pm-9.30pm on 31-05-2018 (Thursday) and feel free to personally get in touch with me if you have further concerns."

shouldn't it be "complimentary"?

"complimentary" = "given or supplied free of charge"
"complementary" = "combining in such a way as to enhance or emphasize the qualities of each other or another"